Hand Held Products 4X00, Руководство пользователя

Страница: 17 / 24

IMAGETEAM™ 4X00 Series Hardware Interface Layer Specification 11
ReadIIC_ICMedia
This function uses the i
2
c interface protocol to read data from 'ucSubaddress' register location and places it at the location
specified by 'pucBuffer'.
unsigned int ReadIIC_ICMedia(
unsigned char ucSubaddress,
unsigned char *pucBuffer
)
Passed Arguments Description
unsigned char ucSubaddress The register location where the data will be read from.
unsigned char *pucBuffer A pointer to the location where the data from the imager will be stored.
Returns
Non-zero if data is successfully read. Zero if there was an error.
RegisterImageLineDataNotificationICMedia
This function is called during initialization of the imager to register a function to be called at various points during the image
acquisition process. This function will most likely be called as the result of a hardware generated line interrupt, an IST generated
from that interrupt, or at different times throughout an image capture based on an internal software scheduler.
DWORD RegisterImageLineDataNotificationICMedia(
void (*fImgDataNotif)(void)
)
Passed Arguments Description
void (*fImgDataNotif)(void) Function pointer to a function that receives no arguments, and returns nothing.
Returns
Zero on failure, non-zero on success.
RegisterVsyncNotificationICMedia
This function is called during initialization of the imager to register a function to be called after the Vsync interrupt. This function
could be called as part of an ISR handler or, as in WinCE applications, this registered function will most likely be called from an
IST.
DWORD RegisterVsyncNotificationICMedia(
void (*fVsyncNotif)(void)
)
Passed Arguments Description
void (*fVsyncNotif)(void) Function pointer to a function that receives no arguments, and returns nothing.
Returns
Zero on failure, non-zero on success.
RequestSynchronizedPowerDownICMedia
This function requests that the imager be put in power down mode upon receiving the next front edge of Vsync. The IC Media
imager freezes when it goes into power down mode, and the goal is to have the imager in the “between frames” state (i.e., in
down time) when this request is made. The difference between this function and the SynchronizedPowerDownICMedia function
is that this function does not wait until the next Vsync to check to see if the imager has successfully been put into power down
mode. The area of the scan driver that uses this function performs that check separately.
void RequestSynchronizedPowerDownICMedia(
void
)